a lot of governments are putting harsher rules atm. mainly because of christmas and nye. it's basically a given that there'll be an increase in cases by january, because people are gonna be partying and not give a shit about the rules. it's been happening for the past 2 years, why would it stop now? every time any time of event comes around, people ignore the rules and about a week later the news is going on about cases going up.
if his concert is in january, it might very well get cancelled, a lot of live events are either getting cancelled or ending up on the news for leading to omicron breakouts